Dhaka, Feb. 3 -- Several passengers travelling from Sylhet to the United Kingdom have been denied boarding at the airport despite having valid travel documents and tickets.

As of Tuesday, at least 14 passengers have faced the problem, according to Biman Bangladesh Airlines' Sylhet Station Manager Shakil Ahmed.

He said the affected passengers have been encountering the issue since last Wednesday at Osmani International Airport. All 14 passengers were bound for London's Heathrow Airport.

Shakil explained that passengers travelling to the UK are required to update their passport details on the UK Visas and Immigration (UKVI) website at least 48 hours before departure, a requirement many are unaware of.

"As a result, when they come to the...